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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW bisected]Aquarium performance reduced a lot"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78997">78997</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW bisected]Aquarium performance reduced a lot
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jianx.zhou@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>System Environment:
----------------------------------------------
Platform: HSW
Libdrm:(master)libdrm-2.4.54-9-g8fc62ca8ac010659023bb63c4759eb683de4f9af
Mesa: (master)52381a7ffba908410f7a53855f082401fca7293a
Xserver:(master)xorg-server-1.15.99.902-91-g01e18af17f8dc91451fbd09020
Xf86_video_intel:(master)2.99.911-177-gbfd0e41d5c7b8bff28ff429b26f4c977e
Cairo:(master)ead5c7909f3db1d0d81121fc2775c458871891b2
Libva:(staging)51901e340cc467a2d562491121e0de38f5a066fe
Libva_intel_driver:(staging)b3031d16b1ea9ef2ab95bc09e59f0db5214a1125
Kernel: (drm-intel-nightly) git-0791a3
Bug detailed description:
Aquarium performance reduced a lot on HSW. The problem only exists on
gnome-session, The problem doesn’t exist on BYT and IVB.
It’s kernel(drm-intel-next-queued) regression, bisecting show that the first
bad commit is:78e8fc6b2e3bbce6170d2ead2406d29930077735
Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
AuthorDate: Tue Apr 29 13:35:44 2014 +0300
Commit: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
CommitDate: Mon May 5 09:09:25 2014 +0200
drm/i915: Fix scanout position for real
Reproduce steps:
--------------------------------------------------------------------
1. xinit&
2. google-chrome-stable --enable-webgl --ignore-gpu-blacklist --user-data-dir
Aquarium.html</pre>
</div>
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